AIPS HELP file for SNPLT in 31DEC21
As of Fri Dec 4 4:03:04 2020
SNPLT: Plots selected contents of an SN, SY, TY, PC, or CL file
INNAME UV data (name).
INCLASS UV data (class).
INSEQ 0.0 9999.0 UV data (seq. #). 0 => high
INDISK 0.0 9.0 Disk unit #. 0 => any
INEXT Input 'SN','SY','TY','PC',
INVERS Input table file version no.
SOURCES Source list
QUAL -10.0 Source qualifier -1=>all
TIMERANG Time range to plot
STOKES Stokes type to plot: R, L,
RR, LL, RRLL, DIFF, RATO
X, Y, XX, YY, XXYY
SELBAND Bandwidth to plot (kHz)
SELFREQ Frequency to plot (MHz)
FREQID Freq. ID to plot, -1=>all
SUBARRAY -1.0 Limit to subarray; 0 -> 1
-1 -> all
BIF 0.0 100.0 First IF to plot, 0=>1.
EIF 0.0 100.0 Last IF to plot 0 -> highest
ANTENNAS Antennas to plot 0=>all
PIXRANGE Range to plot: 0 => self
scale each antenna separately
NPLOTS 0.0 28.0 Number of plots per page
XINC 0.0 5000.0 Plot every XINC'th point
OPTYPE Data to be plotted:
'TSYS','SUM ','DOPL','SNR ',
'MDEL','TANT','ATM ','GEO ',
'IFR ','PDIF','PSUM','PGN ',
'RDLY', 'MULT' ' '=phase
REFANT New reference antenna for
OPCODE Type of plot:
'IFDF' => diff BIF and EIF
'IFRA' => ratio BIF and EIF
'ALIF' => combine all IFs
'ALST' => combine all Stokes
'ALSI' => all IFs & Stokes
APARM MULT only: types to plot
BPARM MULT only: corresponding
minimum for each plot
CPARM MULT only: corresponding
maximum for each plot
DO3COLOR -1.0 2.0 > 0 use 3-color symbols for
ALIF, ALST, ALSI OPCODEs and
DO3COL=2 => color by source
BCOUNT If INEXT ='PC' and OPTYPE =
'AMP' or 'PHAS, BCOUNT
specifies the phase cal tone
number to be plotted. 0->1.
XAXIS Variable data is to be
plotted against, 0=>time.
SYMBOL 0.0 24.0 Plot symbol number: 1 - 24
FACTOR -10.0 10.0 Scale plot symbols by FACTOR
<0 => connect points too
DOBLANK -1.0 24.0 > 0, show blanked values with
symbol type DOBLANK
CUTOFF Table weights <= CUTOFF will
not be plotted, flagged data
are not plotted.
DOSCAN -1.0 2.0 = 1 -> plot full boundaries
= 2 -> plot ticks at scans
LTYPE -410.0 410.0 Type of labeling: 1 border,
2 no ticks, 3 - 6 standard,
7 - 10 only tick labels
<0 -> no date/time
DOTV -1.0 1.0 > 0 Do plot on the TV, else
make a plot file
GRCHAN 0.0 8.0 Graphics channel
XYRATIO 0.0 X/Y ratio 0 -> fit TV or 1 PL
Use: Plots selected calibration data versus time from a specified SN,
TY, PC or CL table.
To examine SN or CL tables with a new reference antenna, run
SNREF with DOKEEP=1 and then use SNPLT.
NOTE: FILLM and FITLD used to fill VLA and VLBA (resp) data
with CL tables having weight 0. These "data" (actually just
(1,0) for (real,imag) gain) are "flagged" and that may be the
reason for a failure to find any data to plot. Of course, you
are wasting time looking at (1,0)'s. CL tables with
interesting values in them will not be flagged in this way.
INNAME.....UV file name (name). Standard defaults.
INCLASS....UV file name (class). Standard defaults.
INSEQ......UV file name (seq. #). 0 => highest.
INDISK.....Disk unit #. 0 => any.
INEXT......'SN','TY, 'PC', 'SY', or 'CL' table to be plotted
INVERS.....Version number of table to plot, 0=>highest no.
SOURCES....Source list. '*' = all; a "-" before a source name means
all except ANY source named.
QUAL.......Only sources with a source qualifier number in the SU table
matching QUAL will be used if QUAL is not -1.
TIMERANG...Time range of the data to be plotted. In order: Start day,
hour, min. sec, end day, hour, min. sec. Days relative to
reference date. If a start and stop time are given and
the XAXIS is 1 (time), then all plots will be from the
given start time to the given stop time. Otherwise, the
X-axis is plotted over the range of X values found in the
data. All plots in a given execution will be on the same
X scale in any case.
STOKES.....The desired Stokes type of the displayed data:
'R' = RCP, 'L' = LCP, 'RL' or 'RRLL' both RCP and LCP
'X' = XLP, 'Y' = YLP, 'XY' or 'XXYY' both XLP and YLP
'DIFF' = vector difference between RCP and LCP or between
XLP and YLP. Thus, if OPTYPE='AMP', the result will
not be zero even when both polarizations have the
same amplitude if the phases differ.
'RATO' = ratio between RCP and LCP or XLP and YLP - done
for amplitudes, system and antenna temperatures, and
SELBAND....Bandwidth of data to be selected. If more than one IF is
present SELBAND is the width of the first IF required.
Units = kHz.
SELFREQ....Frequency of data to be selected. If more than one IF is
present SELFREQ is the frequency of the first IF required.
Units = MHz.
FREQID.....Frequency identifier to select (you may determine which is
applicable from the OPTYPE='SCAN' listing produced by
LISTR). If either SELBAND or SELFREQ are set, their values
overide that of FREQID. However, setting SELBAND and
SELFREQ may result in an ambiguity. In that case, the task
will request that you use FREQID. -1 => all, 0 => first
SUBARRAY...Limit display to specific subarray. -1 -> all, 0 -> 1.
BIF........First IF IF to plot
EIF........Last IF to plot.
If OPCODE = 'IFDF'/'IFRA' will plot difference/ratio of
specified quantity between BIF and EIF.
ANTENNAS...A list of the antennas to be plotted. All 0 => all. If any
number is negative then all antennas listed are NOT to be
plotted and all others are.
PIXRANGE...If PIXR(1) < PIXR(2), all plots will be from PIXR(1) to
PIXR(2). Otherwise each plot will be self-scaling.
NPLOTS.....Number of antennas to plot per page (try 5).
XINC.......Plot every XINC'th point, 0 => 1.
OPTYPE.....Data to be plotted:
1. 'PHAS' = phase,
2. 'AMP ' = amplitude,
3. 'DELA' = singleband delay (SN & CL)
4. 'RATE' = rate (SN, CL & PC)
5. 'TSYS' = sys. temp. (TY) (for VLA is nominal
6. 'SUM ' = all ampl. and all phases on a single plot.
PIXRANGE controls amplitude scaling and
phases are auto scaled.
7. 'DOPL' = doppler offset (CL)
8. 'SNR' = signal/noise (SN & CL)
9. 'MDEL' = multiband delay (SN & CL)
10. 'TANT' = ant. temp. (TY) (for VLA either back- or
front-end system temperature)
11. 'ATM' = atm. delay (CL)
12. 'GEO' = geometric delay (CL)
13. 'CCAL' = cable cal (PC)
14. 'DDLY' = dispersive delay (SN & CL)
15. 'REAL' = real part
16. 'IMAG' = imag part
17. 'IFR ' = Ionospheric Faraday rotation (affects pol
cal) (SN & CL)
18. 'PDIF' = EVLA Gb * (Pon - Poff) (SY)
19. 'PSUM' = EVLA Gb * (Pon + Poff) (SY)
20. 'PGN ' = EVLA post sync-detector gain = Gb (SY)
21. 'PON ' = EVLA Pon (noise tube on) (SY)
22. 'POFF' = EVLA Poff (noise tube off) (SY)
Note that PON and POFF give numbers smaller
than PDIF and PSUM by the factor Gb which
is, by default, 512 and usually ranges in
the 400's when it has been set.
23. 'PSYS' = EVLA PSUM/PDIF/2 * Tcal (=Tsys) (SY)
uses values from the CD table
24 'PDGN' = EVLA Pdif / (4096 * Pgain * Pgain)
25 'PSGN' = EVLA Psum / (4096 * Pgain * Pgain)
26. 'POWR' = (1/Gain amp)^2
27. 'PODB' = Log10 (1/Gain amp)^2
' ' => 'PHAS'
'RPHS' = plot phase re-referenced to REFANT
'RDLY' = plot delay re-referenced to REFANT
XX. 'MULT' => plot multiple types as listed in APARM
using the type numbers given above.
OPCODE.....Type of plot:
'IFDF' => will plot differences between IF's of OPTYPE
data, i.e. if OPCODE= 'IFDF', OPTYPE ='DELA' and
BIF = 3, EIF = 6, will plot delay difference
between IF's 3 and 6.
'IFRA' = ratio between IF's BIF and EIF - done for
amplitudes, system and antenna temperatures, and
SNRs only. Changes to IFDF for others.
'ALIF' => will plot OPTYPE data for all IFs (BIF through
EIF) on a single plot (antennas and polarizations
are plotted separately).
'ALST' => will plot OPTYPE data for both polarizations (R
and L) on a single plot (antennas and IFs are
'ALSI' => will plot OPTYPE data for both polarizations (R
and L) and all IFs (BIF through EIF) on a single
plot (antennas are plotted separately).
other => will plot each request polarization, each
requested IF and each each requested antenna
individually looping in that order.
APARM......OPTYPE = 'MULT' only: Up to 10 types to be plotted. They
are identified by the numbers given in the OPTYPE
section. Note that all requested types must be present
in the same extension file. Asking for delay and Psys
will cause the task to quit.
BPARM......Corresponding minima of each plotted type.
CPARM......Corresponding maxima of each plotted type. 0's =>
DO3COLOR...<= 0 => use line type 4 for all points plotted.
> 0 => use 3-color to separate IFs and Stokes in the
ALIF, ALST, ALSI modes. The actual logic is:
COLOR = 0
DO IF = BIF,EIF
DO POL = 1,Npol
set and use COLOR
COLOR = COLOR + DeltaColor
END DO POL
END DO IF
where COLOR=0 is pure red, DeltaColor is set so that
the last value of COLOR is 0.97 which is almost pure
blue. Thus, if there are 4 IFs and one polarization,
the plot will be of red, yellow, cyan, and blue for
IFs 1 through 4, resp. If there are 2 IFs and 2
polarizations (RR and LL say) in the panel, then red
is RR in IF 1, yellow is LL in IF 1, cyan is RR in IF
2, and blue is LL in IF 2. Note that the blue is
plotted after the red and so may overlap and obscure
DO3COL = 2 tells SNPLT to separate the plotted points
with color representing source. The list of source
numbers actually occurring in the table, time range,
source list, et al. is translated into consecutive
integers (in the same order) and then assigned red
through dark blue. Thus source numbers 1,2,5,10
become red, yellow, cyan, and blue, resp. no matter
what order they appear in the table.
BCOUNT.....If INEXT ='PC', and OPTYPE = 'AMP' or 'PHAS' then BCOUNT
specifies the phase cal tone number to be plotted. 0 -> 1.
XAXIS......Variable data is to be plotted against. 0=> 1
(1) = Data label time
(2) = Antenna elevation
(3) = Hour angle
(4) = Local Sidereal Time
(5) = Parallactic angle
(6) = Antenna azimuth
Moving sources are supported for XAXIS 2-6 if a
PO table is attached.
SYMBOL.....1: Plus sign (default) 12: Five pointed star
2: Cross (X) 13: Star of David
3: Circle 14: Seven-pointed star
4: Box 15: Eight-pointed star
5: Triangle 16: Nine-pointed star
6: Diamond 17: Ten-pointed star
7: Pentagon 18: 11-pointed star
8: Hexagon 19: 12-pointed star
9: Septagon 20: 13-pointed star
10: Octagon 21: 14-pointed star
11: Nine-gon 22: Plus with gap
23: vertical line
24: Cross with gap
FACTOR.....Scale plot symbols by FACTOR 0 -> 1.
If FACTOR < 0, draw lines between the points and use
abs(FACTOR) to scale the points plotted.
DOBLANK....> 0 => plot blanked solutions with a symbol of type
DOBLANK (see symbol types above). They will be plotted
along the lower edge of each plot. NOTE: if DOTV true
and GRCHAN 0 and DO3COL <= 0, then the blanked samples
will be in the color of graphics channel 3 (pink) and the
good samples in the color of graphics channel 4 (blue).
DOBLANK > 0 is forced to be different than SYMBOL by
CUTOFF.....If >= 0, the task will examine the weight column of the
table and if the weight <= CUTOFF, the task will not plot
that sample. If = 0, will plot all good points; flagged
data are not plotted. CUTOFF is ignored for TY and PC
tables and OPTYPEs MDEL, ATM, GEO, and CCAL.
DOSCAN.....> 0 => plot scan boundaries when there is an NX table and
the X axis is time. The boundary is a tick mark when
DOSCAN=2 and a full line when DOSCAN=1.
<= 0 -> do not plot boundaries.
LTYPE......Labelling type, see HELP LTYPE for details:
1 = border, 2 = no ticks, 3 or 7 = standard, 4 or 8 =
relative to ref. pixel, 5 or 9 = relative to subimage
(BLC, TRC) center, 6 or 10 = pixels. 7-10 all labels
other than tick numbers and axis type are omitted.
Less than 0 is the same except that the plot file
version number and create time are omitted.
Add n * 100 to alter the metric scaling.
DOTV.......> 0 => plot directly on the TV device, otherwise make a
plot file for later display on one or more devices
(including the TV if desired).
GRCHAN.....Graphics channel (1 - 7) to use for line drawing.
A value of 0 causes more than one graphics channel to be
XYRATIO....Scale the X axis longer than the Y by XYRATIO.
If DOTV > 0, 0 -> fit to the TV window
If DOTV <= 0, 0 -> 1.